Thanks for the replies.
And yes, it's a fairly steep approach if the airport was located at sea level. My imaginary airport is located 4000' above MSL 😄.
I'm still a bit confused though.
The "old" method of dive and drive is straight forward. But I still can't seem to get my head around the difference in constant descent angle and CDFA.
Is a CDFA profile loaded in the FMS and displayed on the PFD as command bars where the constant descent angle is old fashion altitude vs distance and controlled primarily via VS and the DME read out?